'( Jtl ) 
Species perfedly diftind. The EfiFed of this, though 
infenhble to the naked Eye, or even through a final I 
Telefcope, becomes confderable, when the Objed is 
very much magnified. The Inftrument, when try’d at 
an Objed enclofed, fo as to fecure it from this Inconve- 
nience, feems to bear an Aperture of five Inches and an 
half, with the deepefl oftheforementioned Eye-Glalfes, 
as well as the common Telefcopes do the ufual Charge 
and Aperture given to them, except that in thefe the 
Objeds appear a little brighter. 
Fig, 1 . Reprefents the Infirument placed on the Ma- 
chine, in order to be apply ’d to Ufe. 
Fig, 2, Reprefents the Infide of the Slider, with the reft 
of the Apparatus belonging to the oval Plane and 
Eye-Glafs. 
Fig, Reprefents the hinder Part of the Machine, the 
Back, and one fide of the Box, being taken away, 
to ftiew the turning Pillar and Springs on the Infide. 
Fig,^, Reprefents as it appear’d in^ww^, 1720^ 
by this Telefcope. 
3 X* Anatomia 
